Solution:
Given:
- Diagonal of square: 15√2
- Perimeter of square: 4s
Solving using Pythagoras theorem~
- (15√2)² = s² + s²
- => 225 x 2 = 2s²
- => 225 = s²
- => s = 15 units
Now, solve for perimeter by substituting into the term '4s'.
Hence, the perimeter of the square is 60 units.